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| Section | Weight | Objectives |
|---|---|---|
| Optimize query performance | 15–20% | - Manage workload performance
|
| Plan and implement data platform resources | 15–20% | - Implement migration strategies
|
| Plan and configure high availability and disaster recovery | 20–25% | - Configure high availability solutions
|
| Implement a secure environment | 20–25% | - Secure data at rest and in transit
|
| Monitor and optimize operational resources | 15–20% | - Automate maintenance and operations
|
成功への道を示す指標として、当社のDP-300実践教材は、あなたの旅のあらゆる困難を乗り越えるために役立ちます。 すべての課題をウォークインのように扱うことはできませんが、DP-300シミュレーションの実践により、レビューを効果的にすることができます。 それが、当社のDP-300調査問題がプロのモデルである理由です。 98％以上の高い合格率を誇るDP-300試験問題により、数千万人の受験者が試験に合格しました。
質問 # 349
You have an Azure SQL database.
You have a query and the associated execution plan as shown in the following exhibit.
Use the drop-down menus to select the answer choice that completes each statement based on the information presented in the graphic.
NOTE: Each correct selection is worth one point.
正解：
解説：
Explanation:
Box 1: Key Lookup
The Key Lookup cost is 99% so that is the performance bottleneck.
Box 2: nonclustered index
The key lookup on the clustered index is used because the nonclustered index does not include the required columns to resolve the query. If you add the required columns to the nonclustered index, the key lookup will not be required.
質問 # 350
You are building an Azure Stream Analytics job to retrieve game data.
You need to ensure that the job returns the highest scoring record for each five-minute time interval of each game.
How should you complete the Stream Analytics query? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
正解：
解説：
Reference:
https://docs.microsoft.com/en-us/stream-analytics-query/topone-azure-stream-analytics
https://github.com/MicrosoftDocs/azure-docs/blob/master/articles/stream-analytics/stream-analytics-window-functions.md
質問 # 351
Hotspot Question
You have an Azure SQL database.
You run the following PowerShell script.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.
正解：
解説：
Explanation:
Box 1: No
Short term retention is set to 21 days.
Note: Short term retention policy is used to address point-in-time restores whereas a long-term retention policy is used to address restores from long-term or older backups for various audit and compliance purposes. We can also save these backup files as part of a short-term retention policy for up to 7-35 days.
Box 2: Yes
Weekly retention is set to P52W, which stands for a periodic frequency of 52 weeks (364 days).
Note: -WeeklyRetention
The Weekly Retention. If just a number is passed instead of an ISO 8601 string, days will be assumed as the units. There is a minimum of 7 days and a maximum of 10 years.
Box 3: No
Yearly retention is set to PSY.
Note: -YearlyRetention
The Yearly Retention. If just a number is passed instead of an ISO 8601 string, days will be assumed as the units. There is a minimum of 7 days and a maximum of 10 years.
Reference:
https://strata.opengamma.io/apidocs/com/opengamma/strata/basics/schedule/Frequency.html
https://docs.microsoft.com/en-us/powershell/module/az.sql/set-azsqldatabasebackupshorttermretentionpolicy?view=azps-7.2.0
https://docs.microsoft.com/en-us/powershell/module/az.sql/set-azsqldatabasebackuplongtermretentionpolicy?view=azps-7.2.0
質問 # 352
You are performing exploratory analysis of bus fare data in an Azure Data Lake Storage Gen2 account by using an Azure Synapse Analytics serverless SQL pool.
You execute the Transact-SQL query shown in the following exhibit.
Use the drop-down menus to select the answer choice that completes each statement based on the information presented in the graphic.
正解：
解説：
Explanation:
Box 1: CSV files that have file named beginning with "tripdata_2020"
Box 2: a header
FIRSTROW = 'first_row'
Specifies the number of the first row to load. The default is 1 and indicates the first row in the specified data file. The row numbers are determined by counting the row terminators. FIRSTROW is 1-based.
Reference:
https://docs.microsoft.com/en-us/azure/synapse-analytics/sql/develop-openrowset
質問 # 353
You have SQL Server on an Azure virtual machine named SQL1.
SQL1 has an agent job to back up all databases.
You add a user named dbadmin1 as a SQL Server Agent operator.
You need to ensure that dbadmin1 receives an email alert if a job fails.
Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
正解：
解説：
Explanation
Step 1: Enable the email settings for the SQL Server Agent.
To send a notification in response to an alert, you must first configure SQL Server Agent to send mail.
Step 2: Create a job alert
Step 3: Create a job notification
Example:
-- adds an e-mail notification for the specified alert (Test Alert)
-- This example assumes that Test Alert already exists
-- and that Francois Ajenstat is a valid operator name.
USE msdb ;
GO
EXEC dbo.sp_add_notification
@alert_name = N'Test Alert',
@operator_name = N'Francois Ajenstat',
@notification_method = 1 ;
GO
Reference:
https://docs.microsoft.com/en-us/sql/ssms/agent/notify-an-operator-of-job-status
https://docs.microsoft.com/en-us/sql/ssms/agent/assign-alerts-to-an-operator
質問 # 354
......
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